Mercedes-Benz 603 Service Manual page 287

Renewal
Remove chain tensioner (05310)
2 Check camshaft timing gear for scores and
pitting. Cover chain case with a cloth and grand
off both link pins at a timing chain link.
3 Mount new timing chain with connecting link
on the old timing chain.
4 Slowly turn crankshaft in the direction of
rotation of the engine, while simultaneously
raising the old timing chain until the connecting
link is located at the uppermost position of the
camshaft timing gear.
Pull out the released end of the old timing chain
evenly, to match pulling on the new timing chain.
Caution!
The timing charn must remain engaged with the
camshaft and crankshaft gear while engine is
turned.
5 Detach old timing chain and connect the
ends of the new timing chain with a connecting
link. Secure ends of chain on camshaft timing
gear with wire.
6 Insert connecting link In the timing chain
from behind (arrow).
EXIT